ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Meeting Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
Jun 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
August 2025
Nuclear Technology
Fusion Science and Technology
July 2025
Latest News
The U.S. Million Person Study of Low-Dose-Rate Health Effects
There is a critical knowledge gap regarding the health consequences of exposure to radiation received gradually over time. While there is a plethora of studies on the risks of adverse outcomes from both acute and high-dose exposures, including the landmark study of atomic bomb survivors, these are not characteristic of the chronic exposure to low-dose radiation encountered in occupational and public settings. In addition, smaller cohorts have limited numbers leading to reduced statistical power.
Masaki Takeuchi, Tatsuo Sugie, Shigeharu Takeyama, Kiyoshi Itami
Fusion Science and Technology | Volume 69 | Number 3 | May 2016 | Pages 655-665
Technical Paper | doi.org/10.13182/FST15-191
Articles are hosted by Taylor and Francis Online.
An important issue for ITER divertor infrared (IR) thermography (IRTh) is that changes in the emissivity of tungsten divertor targets resulting from depositions; erosions; and dependences on temperature, wavelength, and surface roughness affect the temperature measurement, which requires an accuracy of 10%. Therefore, we investigated the emissivity dependences of tungsten samples in ITER-grade tungsten and validated the proposed in situ calibration method for emissivity evaluation by using an IR laser in laboratory experiments. The emissivity of the tungsten samples had a strong dependence on surface roughness of 1.0 to 5.9 μm. In the two-color method, by measuring the radiances of the tungsten sample in two wavelengths of 3.35 and 4.67 μm, the change of the ratio of the emissivities did not satisfy the measurement requirement. Thus, an in situ calibration method of emissivity is needed. The emissivity evaluated using the in situ calibration method was in good agreement with the emissivity evaluated from the radiance for tungsten samples at temperatures of 22°C, 100°C, and 400°C. Consequently, the in situ calibration method for emissivity evaluation using an IR laser was successfully validated. More work is needed for the application in IRTh.